Update LLVM (#1410)

Update a test back to what it was before.  I guess change
in the optimizer was reverted?

deps.json

@@ -6,7 +6,7 @@
       "subrepo" : "llvm/llvm-project",
       "branch" : "main",
       "subdir" : "third_party/llvm",
-      "commit" : "30deb76d46053c243561c6fa072c5a30407241cb"
+      "commit" : "1a787b3c8e71eeb333825ec4b76c7440290142e4"
     },
     {
       "name" : "SPIRV-Headers",

test/UBO/transform_global.cl

@@ -54,10 +54,11 @@ __kernel void foo(__global data_type *data, __constant data_type *c_arg,
 // CHECK-DAG: [[c_var_ptr:%[0-9a-zA-Z_]+]] = OpTypePointer Private [[array]]
 // CHECK-DAG: [[c_var_ele_ptr:%[0-9a-zA-Z_]+]] = OpTypePointer Private [[int]]
 // CHECK-DAG: [[zero:%[0-9a-zA-Z_]+]] = OpConstant [[int]] 0
-// CHECK-DAG: [[zero_zero:%[0-9a-zA-Z_]+]] = OpConstantNull [[data_type]]
+// CHECK-DAG: [[undef:%[0-9a-zA-Z_]+]] = OpUndef [[int]]
+// CHECK-DAG: [[zero_undef:%[0-9a-zA-Z_]+]] = OpConstantComposite [[data_type]] [[zero]] [[undef]]
 // CHECK-DAG: [[one:%[0-9a-zA-Z_]+]] = OpConstant [[int]] 1
-// CHECK-DAG: [[one_zero:%[0-9a-zA-Z_]+]] = OpConstantComposite [[data_type]] [[one]] [[zero]]
-// CHECK-DAG: [[array_const:%[0-9a-zA-Z_]+]] = OpConstantComposite [[array]] [[zero_zero]] [[one_zero]]
+// CHECK-DAG: [[one_undef:%[0-9a-zA-Z_]+]] = OpConstantComposite [[data_type]] [[one]] [[undef]]
+// CHECK-DAG: [[array_const:%[0-9a-zA-Z_]+]] = OpConstantComposite [[array]] [[zero_undef]] [[one_undef]]
 // CHECK-DAG: [[c_var:%[0-9a-zA-Z_]+]] = OpVariable [[c_var_ptr]] Private [[array_const]]
 // CHECK-DAG: [[data]] = OpVariable [[data_ptr]] StorageBuffer
 //     CHECK: [[c_arg]] = OpVariable [[c_arg_ptr]] Uniform